Caliper or hose?

I replaced the brake pads on my 79 and noticed the left side caliper had fairly easy pistons to push in, but the right side took a lot of effort. The pads were 50% worn.
The new pads went in and all seemed good until a few minutes into the test drive. Suddenly, the right side front brake became stuck on and it took all of my limited horse power to get the car out of the street.
After letting my car sit for two hours, the car would now move, so I drove it home with little brake use as possible. As I approached my house, I applied the brakes in a panic type stop and the caliper stuck on again.
My question is concerning the cause. Would it appear that my caliper is at fault or my brake hose? (Or something else)

In the garage on stands, apply brakes. On the stuck caliper, open the bleed screw. If you get a squirt of fluid and the brakes release, the hose is bad. If it doesn't release, the piston is rusted. The former is a hydraulic issue, the latter a mechanical one.

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Replace both calipers and flex hoses.... they are nearing 40 years old. I had an enigmatic wobble/oscillation from the steering of my 1989 Dodge D-150 after getting it running again following years of just sitting. Everything pointed to a shock or tire issue. New tires and shocks.... needed them anyway, but no dice on fixing the problem. I redid the brakes with reman calipers, new hoses, wheel brgs, rotors, pads....Fixed!

from what you said about pushing back the calpers, it can be the caliper is seizing...for some reason front right usually goes first...must be the road side junk that get into it....replace the pistons (if you like to work on them) with the newer stainless steel caliper pistons...they will not corrode any more.....

I don't consider economy with something as absolutely crucial as brakes. In for an inch, in for a mile. It is a very old car with parts that might be of questionable integrity. Cheap insurance.... replace both sides!